Perhaps you should try some spelling variations:
cao hoi » cau hoi, co hoi, cao hoc
hieu ve » hieu va, hieu van
thuc va » thuc vat, thuc dan, thuc day
va tinh » may tinh
tu cao » cu cao, tu cac, vu cao
va cao » va cac, va co, va dao
ve am » va am
vi va » vai va, vu va, bi va

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu cao) OR (va cao)) ky nang cao hoi. hieu ve am thuc va tinh ((vi va) OR (vi van)) triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu cao) or (va cao)) ky nang cao hoi. hieu ve am thuc va tinh ((vi va) OR (vi van)) triet~".
• Adding a wildcard symbol may retrieve word variants: ((tu cao) or (va cao)) ky nang cao hoi. hieu ve am thuc va tinh ((vi va) OR (vi van)) triet*.